Box-blank machine



July 28, 1925. G. E. GQODING Box BLANK momma Filed larch 8, 1924 ATTORNEY?!- Patented July 28, 1925.

GEORGE E. GOODING, OF BOSTON, ItIASSACHUSETTS,

ASSIGNGR TO JOHN T. ROBINSON COL'IPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OE MIASSACHUSETTS.

BOX-BLANK MACHINE;

Application filed March 8, 1924. Serial No. 697,841.

To all whom it may concern.

Be it known that I, GEORGE E. GooniNo, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Box-Blank Machines, of which the following is a specification, reference being had therein to the accompany-- ing drawings.

This invention relates to machines for operating upon flat paper and similar stock and especially to rotary machines for forming paper box blanks by trimming the marginal edges thereof and scoring or creasing the same along the lines upon which the blank is to be folded in the formation of the box. A machine of this type comprises a pair of parallel shafts provided with coacting annular tools for performing the required operations upon the blanks as the latter are passed between the rolls. In order to apply the tools to such a machine or re move the same therefrom for the purpose of grinding, replacement, or substitution in accordance with the particular work being performed, it has heretofore been necessary to dismantle the machine to a sufficient extent to remove the shafts, since the tools heretofore employed, having essentially continuous annular faces, can be applied to the shafts or removed therefrom only by slipping the same over the ends of said shafts.

The present invention has for its object the provision of tools for use in machines of this character which, while having accurately formed, continuous circumferential working surfaces or edges, may be readily applied to their shafts or removed therefrom and adjusted into any desired position thereon without removing the shafts from the machine.

The foregoing and other objects of the invention, together with means whereby the same may be carried into effect, will best be understood from the following description of one form and application thereof illustrated in the accompanying drawings, in which:

Fig. 1 is a front elevation of a rotary creasing machine having creasing and trimming tools constructed in accordance with the invention.

Fig. 2 is an enlarged front elevation of a portion of the mechanism shown in Fig. 1,

the two shafts being shown in different an.- gular positions.

Figs. 3 and 4 are sections taken substantially on the lines 33 and 4-4, respectively, Fig. 2.

he invention is herein shown embodied in a rotary creasing machine for trimming heavy cardboard blanks and creasing the same along the lines upon which they are to be folded in the formation of paper car- .tons. The machine comprises a pair of uprights 10 connected by cross frame members 11 and 12 and between which extend two transverse parallel shafts 13 and 14 adapted to be rotated in unison through suitable connections (not shown) from a suitable source of power. The shafts 13 and 14 are jour- 'nalled at their ends in bearing boxes 15 and 16 vertically adjustable in the uprights 10, and intermediate their ends in bearings 17 and 18 supported through brackets 19 and 20 from the transverse frame members 11 and 12, respectively. The bearings 17 and 18 may be adjusted toward and from one another to vary the relative positions of the shafts 13 and 14 in accordance with the requirements by means of adjusting screws 21 and 22, being secured in adjusted position by clamping bolts 23.

Carried by the shafts 13 and 14 are the rotar 1 tools for operating upon the stock. As herein shown, the shaft 13 is provided with a plurality of annular creasing tools 24 which cooperate with a corresponding set of complementary creasing tools 25 on the shaft 14, said shafts being also provided adjacent their ends with cooperating annular cutting tools 26 for trimming the edges of the blank. In Order that said creasing and cutting tools may be readily applied to and removed from the shafts 13 and 14 without removing said shafts from the machine, each of said tools is formed in a plurality of segmental sections assembled about the shaft and secured thereto in any desired position longitudinally thereof.

As shown in Figs. 2 and 3, each of the creasing tools 24 comprises two semi-circular sections 27 and 28 of an internal diameter corresponding to the diameter of the shaft to which they are applied, one of said sections being provided at its ends with a pair of parallel bolts 29 adapted to engage, respectively, the ends of the other section 27,

being herein shown as in direct threaded engagement therewith, for drawing the sections together about the shaft. It will be seen that, by placing the sections 27 and 28 upon the shaft and tightening the bolts 29 alternately equal amounts, the sections can be drawn tightly into place upon the shaft without distortion of the cutter as a whole. The sections 27 and 28 are relatively positioned by means of suitable keys, herein shown as dowel pins 30 carried by the section 28 and entering openings in the section 27. It will be seen that the peripheral surface of each tool can be accurately ground with the sections assembled and that the keys or dowel pins 30 enable said sections to be separated and again assembled in the relationship required for the accurate continuity of the working surfaces thereof.

Each shaft 13 and 14 is formed with a longitudinally undercut groove 31 in which are slidably mounted a suitable number of threaded nuts 32. One of the sections of each of the creasing tools, herein the section 28, is provided with a bolt 33 adapted to engage one of the nuts 32 to clamp the tool in adjusted position on its shaft.

The construction of the cutting tools 26 is substantially similar to that of the creasing tools. As shown in Figs. 2 and 4 each of said cutting tools comprises two semi-circular sections 34 and 35 connected at their ends by a pair of parallel bolts 36 and relatively positioned by means of fiat keys 37, one of said sections, herein the section 35, being provided with a bolt 38 similar to the bolt 33 for cooperation with a nut 32.

Having thus described my invention, I claim:

1. A machine for forming paper box blanks comprising a pair of parallel shafts and coacting annular tools on said shafts, respectively, each of said tools comprising a plurality of segmental sections assembled about the shaft, keys for relatively positioning said sections, and bolts for securing said sections in assembled position, each of said shafts and one of the sect-ions of each of the tools thereon having cooperating clamping devices for securing said tools in adjusted position on said shafts.

2. A machine for forming paper box blanks comprising a pair of parallel shafts and coacting annular tools on said shafts, respectively, each of said tools comprising a plurality of segmental sections assembled about the shaft, each of said shafts having a longitudinal undercut groove, nuts slidably mounted in the grooves in said shafts, and a bolt carried by one of the sections of each of said tools, said bolts engaging said nuts to secure said tools in adjusted position on said shafts.

In testimony whereof I afiix my signature.

GEORGE E. GOODING. 

